2118705 has 16 divisors (see below), whose sum is σ = 3417984. Its totient is φ = 1120640.

The previous prime is 2118703. The next prime is 2118733. The reversal of 2118705 is 5078112.

It is not a de Polignac number, because 2118705 - 2¹ = 2118703 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2118703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1540 + ... + 2570.

It is an arithmetic number, because the mean of its divisors is an integer number (213624).

2^2118705 is an apocalyptic number.

It is an amenable number.

2118705 is a deficient number, since it is larger than the sum of its proper divisors (1299279).

2118705 is a wasteful number, since it uses less digits than its factorization.

2118705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 2118705 is about 1455.5772050977. The cubic root of 2118705 is about 128.4370032422.

The spelling of 2118705 in words is "two million, one hundred eighteen thousand, seven hundred five".